Zone 6b planting calendar

What to plant in September: zone 6b

Zone 6b averages its last spring frost around April 25 and its first fall frost around October 15. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.

Last frost: April 25

First frost: October 15

Winter lows: -5 to 0 °F

Zone 6b Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Transplant for fall

Kalearound Sep 1
Last safe transplant date to mature (55 days) before frost on 10-15.

Direct sow for fall

Radisharound Sep 12
Succession sowing 2 of 3. Sow every 14 days for a steady cut.
Spinacharound Sep 16
Counts back 40 days from your first frost. Frost-hardy: light freezes sweeten it.
Radisharound Sep 26
Counts back 30 days from your first frost. Frost-hardy: light freezes sweeten it.

Sow cover crop

Cover crop (cereal rye + crimson clover)around Sep 15
Sown a month before frost it germinates, holds your soil all winter, and feeds it in spring.

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